Automatic dumping-bucket for hoisting and conveying machines



(No Model.) 4 Sheets-Sheet 1.

A. E. BROWN. AUTOMATIC DUMPING BUUKET FOR HOISTING AND CONVEYING MACHINES. No. 427,830. Patented May 13, 1890.

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(No Model.) 4 Sheets-Sheet 2.

A. E. BROWN. AUTOMATIGDUMPING BUGKET'POR HOISTING AND CONVEYING MACHINES. No. 427,830; Patented May 13, 1890.

(No Model.) 4 Sheets-Sheet 3.

, A. E. BROWN. AUTOMATIC DUMPING BUCKET FOR HOISTING AND CONVEYING MACHINES.

Patented May 13, 1890.

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i (No Model.)

, A. E. BROWN. AUTOMATIC DUMPING BUCKET POR HOISTING AND CONVEYING MACHINES. No. 427,830. Patented May 13, 1890.

UNITED STATES PATENT OFFICE.

ALEXANDER E. BROWN, OF CLEYELAND, OHIO.

AUTOMATIC DUMPlNG-BUCKET FOR HOISTING AND CONVEYING MACHINES.

SPECIFICATION forming part of Letters Patent No. 427,830, dated May 13, 1890,

Application filed February 20, 1890! Serial No. 341,156. (No model.)

T0 at whomt't may concern.-

Be it known that I, ALEXANDER E. BROWN, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented a new and useful Improvement in Automatic Dump- Buckets for Hoisting and Conveying Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

My present invention relates to a novel construction of automatic dump-bucket for hoisting and conveying machines, and is an improvement upon the kind of automatic bail latching and unlocking mechanism made the subject of United States Patent No. 368,453, granted to me August 16, 1887.

I have found bypractical experience in the use of my said. patented contrivance that, while under ordinary circumstances the mechanism shown and described in the patent for effectuating the automatic dumping of the bucket to discharge its contents and the relocking of the bail in place preliminarily to the lifting up and conveyance of another charge or load of material by the bucket works satisfactorily and perfectly, there is one condition or contingency (which is liable to arise once in a while) under which my said patented contrivance does not always operate successfully. I have found that on these occasions,.when the filled bucket may happen to be lowered onto the oblique side of a pile or heap of material in such manner that the weight of the bucket will be supported by the slanting side of the pile at a sufficient degree of obliquity to the horizon, the mechanism shown in my patent and designed to effect the dumping automatically of the bucket will not work successfully, owing to the fact that the intended over-balancing weight of the material at the month end or front of the bucket is neutralized by the oblique position in which the bucket rests on the side of the pile, so that the engaging-lugs of the bail or'handle of the bucket will, upon the lowering of the bail, escape from the camlike devices, and then, upon the lifting of the bail, the ascending lugs thereof "will ride uplatcrally over the inclined surfaces or cheekpieces of the said cam-like devices in such manner that the bail or handle, when entirely lifted up, will have its lugs re-engaged with the cam-like devices, all in such manner that the filled bucket will be carried up without having been afforded any chance to turn on its trunnions and discharge its contents. To overcome this defect or difficulty in my said patented contrivance, which, as before remarked, arises only under the special contingency or circumstance just above explained, I have devised the improvement which is made the subject of this application, and which consists, essentially, in the addition to each one of the cam-like devices of my patented contrivance of an additionalrecess and wall-like stop, within which the engaging-lugs are confined at certain times, and a pivoted or movable bridge pawl or bar, all as will be hereinafter more fully explained, and as will be more particularly pointed out and defined in the claim of this specification.

To enable those skilled in the art to which my improvement relates to understand and practice the same, I will now proceed to more fully describe the nature of my present improvement on my patented machine, referring by letter to the accompanying drawings, which form part of this specification, and in which I have shown my invention carried out in the precise form in which I have so far successfully and extensively practiced it.

In the drawings, Figure 1 is a side view of an automatic dump-bucket fora hoisting and conveying machine, made otherwise in substantial accordance with my patented hoistbucket, but having the improvement made the subject of this application applied thereto, and in this figure I have illustrated the bucket as resting upon the oblique side of a pile of material (down onto which it is sup posed to have just descended preparatory to the intended discharge of the contents of the bucket) in that condition under which my said patented contrivance would not work right. Fig. 2 is a similar view of the improved bucket, but shown in the changed position which it would assume after having been partially lifted and tipped over by the ascent of the bail or handle induced by the action of the hoist-rope of the hoisting-machine.

Fig. 3 is a duplication of a portion only of the parts seen at Fig. 1, but drawn on a considerably enlarged scale, and having a part of the bail or handle broken away for the pur- 5 pose of more plainly showing my improved latching mechanism, and indicating by full and dotted lines the two positions which the bridge-lever may be made to assume. Fig. t

is a detail cross-sectional view at the line a:

IO of Fig. 3. Fig. is a duplicate of a portion of the parts seen at Fig. 2, but drawn (like,

Figs. 3 and 4) on an enlarged scale. Fig. 6 is a perspective View of one of the improved cam-like devices with its pivoted bridgebar I 5 detached from the bucket. Fig. 7 is a side view of the same detached parts. Figs. 8 and 9 are respectively a perspective view and a side elevation of the cam-like plate or device (detached from the bucket) that is shown and described in my said patent, these figures be ing introduced into the drawings of this case to enable me to better explain the nature of my present improvement or invention.

In Figs. 1 to 7, inclusive, the same partwill be found always designated by the same letter of reference, while on Figs. 8 and 9 I have used the same reference numerals and letters that are seen on the corresponding parts, Figs. 7 and 8, of the drawings of my said pat- 3o ent.

Referring now to Figs. 1 to 7, inclusive, A represents the bucket proper of one of my patented automatic dump-buckets, and B the bail or handle, the pivoted levers a of which are provided, as shown, with engaging-lugs c,

that are adapted to co-operate with the camlike plates or devices D, that are secured to the sides of the bucket.

61 are the wheels on which the bucket rests when lowered onto any supporting-surface, and the general construction and mode of operation of the bucket, it will be understood, are substantially the same as shown and described of the dump-bucket made the subject 5 of my said patent of August 16, 1887. Each one of the cam-plates D, however, instead of being made as shown in said patent, is formed with the supplemental devices of an additional recess 1 and an outwardly-projectingrib orwall f, which operates to prevent the escape of the engaging-lug c of the bail-lever whenever the bail (after having been lowered) tips or oscillates in the direction indicated by the arrow at Fig. 1, and has the additional device of a 5 5 bridge-bar g. This bar g is pivoted to the top rim of the bucket and acts when in its lowermost or normal position as a bridge, and at the same time is so arranged and so operates that when the bail or handle B shall have been lifted from the position into which it may have descended when the bucket was lowered onto a pile, as seen, for instance, at Fig. 1, the engaging or looking lug c of the bail-lever will strike against the under side of said bridge-bar g, and, lifting it upwardly, will be permitted to make its escape from the detaining -recess 2' of the camplate D,

the said lever g, after having resumed its normal position, forming a bridge across the upper end of the recess 7;, as above mentioned, over which the engaging-lug c of the bail-lever will travel whenever the handle or bail shall be moved in a direction opposite to that indicated by the arrow at Fig. l to allow the emptied bucket (see Fig. 2) to resume a rightcd and locked condition ready for its transference to the locality at which it is to be refilled.

In my patented dump-bucket (which works all right except under the conditions illustrated at Figs. 1 and 2) the operation, it will be understood, is suchthatif the filled bucket be lowered onto an oblique resting-surfacesuch as illustrated at Fig. 1, for instancethe lowering of the bail into the position seen in said figure will result in the escape of the lugs c from the recesses of the cam-plates, and then on the initial lifting of the bail into the position shown at Fig. 2 the lugs 0 will ride over the upper parts of the cam -plates and get into engagement with the recesses nearest to the front edge or mouth of the bucket, so that as the lifting of the bail is continued the bucket, thus locked to the bail, will be lifted up without having been permitted to tip and dump its contents. This will be most easily understood by reference to Figs. 8 and 9, from which it will be seen that if a bucket provided with cam-like devices such as there shown be lowered in a filled condition into the position indicated at Fig. 1 a slight further descent of the bail will permit the locking-lugs c to descend from the position numbered 1 at Fig. 8 to that marked 2, and that thereafter on lifting the bail the lugs 0 will ascend in lateral contact with the side portion 8 of the cam-plate until they shall have reached the position 3, whereupon, the lower ends of the bail having by this time come to bearings on the trunnions of the bucket, said bail will vibrate in a direction opposite to that indicated by the arrow at Fig. 1 until the lugs 0 shall have passed over into the positions indicated by 4 at Fig. 9, because during the continued lift on the bail, (by the hoist-rope,) after its lower ends shall have come to bearings on the trunnions of the bucket, the latter has its center of gravity at such a point relatively to the trunnions and the ascending and vibrating bail that there is no tendency for the filled bucket to tip forward on its pivoted connections with the ends of the bail. iVith the supplemental devices and changes, however, that constitute the pith of my present improvement it is physically impossible for the bail to be lifted without effecting the lifting up of the filled bucket into such aposition that the superabundance of the weight of the contents at the forward end of the bucket will be brought into operation to effect the turning of the bucket on its trunnions or on the pivotal connection with its bail into the position illustrated at Fig. 2, because during the initial pull of the hoist- Fig. 1 to one in which the preponderance of weight in the front portion of the filled bucket will cause it to tip forward, the lugs c then riding backward over the inclined surfaces 2 (see Fig. 3) of the cam-plates while the bucket dumps. Of course after the complete discharge of the contents of the bucket by the lifting of the latter clean away from the supporting-surface, so as to permit the month end of the bucket to travel still farther in the dumping direction, the bucket will right itself by reason of the preponderance of weight at the back side of the emptied bucket, all in a manner Well known to those skilled in the art and agreeably to the mode of operation of my patented self-dumping bucket; and it will be understood, of course, that as the bucket thus resumes its normal or righted position the locking or engaging lugs c are not obstructed at all in their movements relatively to the oscillating and righting bucket by the presence of the lug-retaining recesses 1', since at this time, the bridge-bars 9 having descended by gravity to their normal positions, said bars form perfect bridges, so to speak, (see Fig. 4,) across the upper end of the recesses 71, over which bridges the lugs c freely travel to permit the bucket to resume 7 its normal position in the emptied condition. When the emptied bucket shall have been returned to the locality at which it is to be filled, the lowering of the bucket onto the plane of support and the further lowering of its bail cause the lugs c of the latter to descend from the positions indicated at 4, Fig. 9, to that marked 5, and upon the lifting up of the bail to elevate the filled bucket these lugs. will pass from the positions marked 5 to those indicated by 1 at Fig. 9, in which latter positions they are positively locked to the bucket, all as fully shown and described in my said patent.

Having now so fully explained the nature of my invention or improvement upon my patented automatic dump-bucket that those skilled in the art can make and use the patented article with the additional improvement made the subject of this application, What I claim herein as new, and desire to secure by Letters Patent, is

The combination, with the bucket, its bail, and the locking-levers provided with engaging-lugs c, of the grooved or recessed camplates D, formed with the detaining-recesses i1 and provided with pivoted bridge-bars g, the whole constructed and operating together in substantially the manner and for the purposes hereinbefore set forth.

In witness whereof I have hereunto set my hand this 18th day of January, 1890.

ALEX. E. BROWN. In presence of (JHAs. W. KELLY, O. B. KRAUSE. 

